Contract Source Code:

// Max buy = 3% Max sell = .1%
// An experimental ponzi token based around the idea of not being able to sell a high % in one tx
// As pice goes up, so does the amount of eth you can sell at once
// https://twitter.com/PonziExperiment
// t.me/ponziportal
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

contract PonziExperiment is IERC20 {
    string private _name = "Ponzi Experiment";
    string private _symbol = "PONZI";
    uint8 private _decimals = 18;
    uint256 private _totalSupply = 100_000_000 * 10**uint256(_decimals);
    address private _owner;
    address private _taxAddress;
    uint256 private _maxBuyPercentage = 3;
    uint256 private _maxSellPercentage = 10; // 0.1%
    uint256 private _taxPercentage = 3;

    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    bool public tradingStarted = false;

    constructor() {
        _owner = msg.sender;
        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, msg.sender, _allowances[sender][msg.sender] - amount);
        return true;
    }

    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");

        if (!tradingStarted && sender != _owner) {
            require(sender == _owner, "Trading has not started yet");
        }

        uint256 taxAmount = 0;
        if (sender != _taxAddress) {
            taxAmount = (amount * _taxPercentage) / 100;
            require(amount <= maxBuyAmount(), "Exceeds max buy percentage");
        } else {
            require(amount <= maxSellAmount(), "Exceeds max sell percentage");
        }

        uint256 finalAmount = amount - taxAmount;

        _balances[sender] -= amount;
        _balances[recipient] += finalAmount;
        _balances[_taxAddress] += taxAmount;

        emit Transfer(sender, recipient, finalAmount);
        emit Transfer(sender, _taxAddress, taxAmount);
    }

    function _approve(address owner, address spender, uint256 amount) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function startTrading() public {
        require(msg.sender == _owner, "Only the owner can start trading");
        tradingStarted = true;
    }

    function setTaxAddress(address taxAddress) public {
        require(msg.sender == _owner, "Only the owner can set the tax address");
        _taxAddress = taxAddress;
    }

    function renounceOwnership(address newOwner) public {
        require(msg.sender == _owner, "Only the owner can renounce ownership");
        _owner = newOwner;
    }

    function maxBuyAmount() public view returns (uint256) {
        return (_totalSupply * _maxBuyPercentage) / 100;
    }

    function maxSellAmount() public view returns (uint256) {
        return (_totalSupply * _maxSellPercentage) / 10000;
    }

    function setMaxBuyPercentage(uint256 maxPercentage) public {
        require(msg.sender == _owner, "Only the owner can set the max buy percentage");
        require(maxPercentage <= 100, "Percentage must be less than or equal to 100");
        _maxBuyPercentage = maxPercentage;
    }
}